<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title></title>
    <script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
  </head>
  <body>
    <div id="app"></div>
    <script>
      //1. 实例化一个Vue的实例
      let vm = new Vue({
        el: "#app",
        data: {},
      });
    </script>
  </body>
</html>
